11 Concept of A* (A Star) Add the starting node (tile) to the open list.Look for the lowest F cost node on the open list. We refer this as the current node.The node move from open list to close list.For each of the 4 nodes, top, right, down and left adjacent to this current node. If nodes note closed or not reachable then skip them. If the node is in the open list already, check the G cost. Select the linked note of lowest G with cost 1. If the node is not in the open list, then add to open list.Repeat step 2 to step 4 until found the target node (tile) and return the path. But if the open list is empty and not reaching the target tile yet that means you can't reach the target node and return false.

16 Fuzzy Logic Degrees of value Fuzzy State MachineIf True is 1, False is 0. We should have 0.1 fuzzy values, which near false but not absolutely false.Fuzzy State MachineWhen design AI State machine, we should apply fuzzy values for state controlling and state presentation

19 Combs methodWilliam E. Combs designed a method to prevent combinatorial explosion in fuzzy logic rules. The method describes the direct relationship between every variable and the fuzzy value of state. AI system then combines all results to generate the final result.